Oscars are such popular fish for obvious reasons and I would love to be able to keep them myself
If EVERYONE that tries/tried to keep Oscars got the right sized tank then I would go into the 'big tank business' as I would sell a lot
Sadly though there are all too many people getting small Oscars and kidding themselves that they will upgrade to a monster tank later but don't. As previously suggested, Oscars grow at such a rate it seems pointless getting them until the correct sized tank is available.
Not suggesting the OP is in this category